[Avodah] The Scope of the "7 Mitzvos d'Rabbanan"

[rabbirichwolpoe at gmail.com]

There is a cute g'matriya of Kesser =
720 by adding 7 debannans to our Taryag d'oraissos

Because BeHag includes many derabbans [irc much more than 7] and the
Hareidim lists dozens of derbabanans

Therefore I am curious as to how to determine the correct parameters
of these 7. [Let's axiomatically grant that this is true, that there
are w/o debate the Seven] what valid conclusions may we extrapolate and
which would be learning from "klalos"

So AISI We need to identify:
1 when did this 7 first appear as a stated list?
2 what are the parameters for inclusion?
3 How do we  realistically treat derabbanans outside this pale?
4 What is the Behag's criteria for those derabbanan's in his Taryag?
5 what is the Hareidim's criteria for his dozens of derabbanan's?

KT
RRW
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